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Thread: Specifications

  1. 9th January 2013, 10:31 AM #1
    Tiptoeturtle Guest

    Default Specifications

    Hello,
    I have an Hercus Model C, which was made in 1946, according to the serial number.
    My question is where might I start looking for techinical information about the size of the thread and tpi for a chuck for it. (It has a 3 jaw Burnerd chuck fitted, but I have no 4 jaw chuck, so my question conecrns what I need to look for in chucks for sale).
    Donald
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  3. 9th January 2013, 12:01 PM #2
    bwal74
    bwal74 is offline SENIOR MEMBER
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    Default

    Hi,

    Try Mal at:

    HERCUS 9" LATHE

    or these guys have some Hercus stuff:

    NEDRUD SALES items - Get great deals on Australian Coins, Perth Mint Silver items on eBay Stores!

    Cheers Ben.
  4. 9th January 2013, 03:22 PM #3
    pipeclay
    pipeclay is offline GOLD MEMBER
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    You would need to either get a chuck with an integrated thread of 1 1/2"x 8 tpi or a plain back chuck and make your own backing plate to suit or purchase a chuck that already has a backing plate attached to it.
  5. 9th January 2013, 03:34 PM #4
    nadroj
    nadroj is offline Mechanical Butcher
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    According to the Hercus 9" lathe brochure, the spindle thread is 1 1/2 inch diameter, 8 threads per inch, USS standard.
    I think the USS is 60 degree thread form.

    Jordan
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